570 results about "Materials testing" patented technology

The invention relates to the technical field of composite material detection, in particular to a fiber-reinforced thermosetting thermoplastic composite structure interface quality detection method and system.The method comprises the steps that vibration excitation is applied to a target area of the surface of a to-be-detected sample, and the amplitude of the excitation is lower than the damage critical value of a weak bonding interface; a dynamic response signal perpendicular to the interface is collected in a vibration field non-diffusion area of the excitation point of the target area; performing frequency domain transformation on the dynamic response signal, and separating a fundamental frequency component and at least one high-order harmonic frequency component; according to the nonlinear enhancement effect of the high-order harmonic frequency component relative to the fundamental wave frequency component, whether the weak bonding defect exists in the target area or not is judged. According to the method, the technical bottleneck that the dynamic evolution process of the weak bonding defect of the composite material interface is difficult to capture in real time is effectively solved, sensitive response to the microdefect is realized through a nonlinear harmonic characteristic enhancement effect, and the recognition precision of traditional ultrasonic detection is improved.

Disclosed example testing system sensor verification devices: a shaft; a body; and a force generator having a first predetermined force response, the first force generator coupled to the shaft and the body such that actuation of the shaft in a first direction from a predetermined position causes the force generator to generate the first predetermined force response.

The invention discloses a method for testing weather resistance of a material based on a low-temperature ice and snow environment, which belongs to the technical field of material testing, and comprises the following steps: generating a dynamic environment parameter set according to an environment simulation script, applying dynamically changing ice and snow loads and multiple physical and chemical environment stresses in a preset composite environment stress cabin, constructing a coupling environment field acting on the to-be-tested sample; and acquiring the state of the to-be-tested sample in the coupling environment field in real time, generating a multi-dimensional monitoring data set, performing comparative analysis on the multi-dimensional monitoring data set and a preset material aging characteristic template, generating material response data representing the current state of the to-be-tested sample, and constructing an environment parameter adjustment instruction set to regulate and control the coupling environment field in the composite environment stress cabin in real time. According to the method, a closed-loop feedback control strategy combining construction of a dynamic coupling environment field and real-time monitoring of material response is adopted, intelligent acceleration of the testing process can be achieved on the premise that the authenticity of a failure mechanism is guaranteed, and the testing efficiency and the accuracy of a result are remarkably improved.

The invention relates to the technical field of wind power blade material testing, and discloses a testing device and method for a salt spray corrosion test of a wind power blade composite material layer. According to the method, wind power blade composite material coating preparation parameters are obtained, and coating basic information is provided for subsequent performance evaluation; based on preset salt spray test environment control parameters, dynamic salt spray environment simulation conditions are generated so as to better fit the actual outdoor environment; then, a multi-sensor coupling monitoring network is constructed, real-time data acquisition is conducted on the corrosion process of the composite material coating, and comprehensive tracking of the corrosion process is achieved; processing real-time data by utilizing a corrosion characteristic analysis algorithm, generating a multi-dimensional corrosion characteristic index, and quantitatively representing the corrosion condition of the coating; and finally, evaluating the anti-corrosion stability of the new material coating in combination with the coating characteristic parameters and the multi-dimensional corrosion characteristic indexes. According to the method, the corrosion resistance of the coating in the actual environment can be more accurately reflected, and support is provided for research, development and application of the composite coating of the wind power blade.

The invention relates to the technical field of material detection, in particular to a silver coating adhesive force detection method based on multi-frequency impedance imaging, which comprises the following steps: applying a dual-mode multi-frequency excitation signal to the surface of a silver coating through an attached microelectrode array, synchronously acquiring voltage-current response data, and generating a dual-mode multi-frequency impedance original data set; performing time-varying impedance phase-locked separation on the dual-mode multi-frequency impedance original data set, extracting a dynamic impedance component of a coating-matrix interface region, and reconstructing a three-dimensional sub-interface impedance distribution diagram; and outputting an adhesive force quantized value through an oscillation frequency-adhesive force conversion model according to the spatial oscillation frequency characteristics of the impedance phase in the three-dimensional sub-interface impedance distribution diagram. According to the invention, a double-phase-locked loop system is adopted to realize the time-varying component demodulation of the impedance response of the silver coating-matrix interface, the low-frequency dynamic impedance signal modulated by silver ion migration is effectively extracted, and the weak change of the interface bonding state is sensitively reflected.

The invention relates to the technical field of metal plastic forming, and discloses a titanium alloy radial forging reduction rate collaborative optimization method based on material testing, which comprises the following steps of: acquiring dynamic characteristic data in a forging process in real time by acquiring multi-dimensional material performance parameters, and constructing a multi-target collaborative optimization model; and intelligent collaborative configuration of the reduction rate parameters is realized by adopting a self-adaptive weight distribution strategy. And a thermal coupling factor normalization equation and a phase field free energy functional normalization model are established, and the technical problems that in a traditional forging process, due to empirical configuration of reduction rate parameters, the structure is uneven, and residual stress exceeds the standard are solved. A lightweight model is deployed through edge computing nodes, millisecond-level dynamic correction of an optimization scheme is realized in combination with a 5G industrial private network, and the grain size qualification rate and the size precision of the titanium alloy forgings are improved. The method improves the yield of the grain size of the forge piece, ensures that the residual stress of the forge piece is reduced, stably controls the size precision, and improves the batch stability of high-end titanium alloy parts.

The present application relates to the technical field of metal plastic forming, and discloses a titanium alloy radial forging reduction rate collaborative optimization method based on material testing, which acquires dynamic characteristic data of a forging process in real time through multi-dimensional material performance parameter collection, constructs a multi-objective collaborative optimization model, and realizes intelligent collaborative configuration of the reduction rate parameter by using an adaptive weight distribution strategy. A thermal coupling factor normalization equation and a phase field free energy functional normalization model are established to solve the technical problems of uneven structure and excessive residual stress caused by the empirical configuration of the reduction rate parameter in the traditional forging process. A lightweight model is deployed through an edge computing node, and millisecond-level dynamic correction of the optimization scheme is realized in combination with a 5G industrial private network, thereby improving the grain size qualification rate and size accuracy of titanium alloy forgings. The present application improves the grain size qualification rate of forgings, ensures stable control of the size accuracy while reducing the residual stress of forgings, and improves the batch stability of high-end titanium alloy components.

The invention discloses a multi-axis multi-field coupling fatigue test device, and belongs to the technical field of material testing. The device comprises a rack, a multi-axis loading unit, an environment simulation unit, a dynamic sealing interface and a cooperative control system. The core of the device is that the test sample can simultaneously bear the coupling effect of multi-axis mechanical stress (pulling, pressing and twisting) and various environmental fields (such as high and low temperatures, corrosive media, illumination and electric fields) through a highly integrated design; and the dynamic sealing problem of the actuator rod in the environment box is solved through an innovative dynamic sealing interface (such as labyrinth-magnetofluid composite sealing). According to the invention, accurate linkage control of multiple channels is realized through the cooperative control system, the service environment of key parts under actual complex working conditions can be truly simulated, and a reliable test platform is provided for failure analysis and life prediction of products under multi-field coupling.

An apparatus for material testing of a specimen. The apparatus-includes a specimen holder for holding a specimen to be tested, a rod arrangement for moving in direction to the specimen holder for transmitting a mechanical load to the specimen, an actuator for moving at least one of the rod arrangement and the specimen holder with respect to each other along a horizontal impact direction, and a supporting base, onto which the specimen holder, the rod arrangement and the actuator are mounted. A specimen holder arrangement is detachably coupled to a holder accommodation section of the supporting base.

The invention discloses a soft soil reinforcement material performance analysis method and system, particularly relates to the technical field of material testing, and is used for solving the problem that an existing discretization testing method cannot accurately judge a material performance stabilization critical time point. Performance parameter time sequence data are obtained through continuous monitoring of a sensor, the mode stability quantity representing evolution characteristic consistency and the complexity equilibrium quantity representing multi-time scale behavior regularity are calculated, candidate critical points are identified when the mode stability quantity and the complexity equilibrium quantity are continuously higher than and lower than set threshold values respectively, and then the candidate critical points are identified through comparison verification with a standard performance development envelope band. Finally, an effective performance stabilization critical time point is output, continuous monitoring and accurate analysis of the whole material performance development process are achieved, and a reliable technical means is provided for performance evaluation of the soft soil reinforcement material.

The invention relates to the field of metal material testing, in particular to equipment for testing material performance, which comprises a testing platform, the testing platform is provided with a detection mechanism, a supporting mechanism, an extrusion mechanism and a power mechanism, the extrusion mechanism and the power mechanism are arranged on the supporting mechanism, and the extrusion mechanism comprises an extrusion block and a reversing unit for adjusting the orientation change of the extrusion block. At least one end of the extrusion block is open, the extrusion block is used for shearing and crushing a to-be-tested substrate, and a rotating handle is arranged on the extrusion block; and the power mechanism comprises a shearing driving unit and a pressure driving unit which are used for driving the extrusion block to move. By implementing the scheme, the test efficiency of the magnesium alloy material under various test conditions is improved.

The invention belongs to a testing and processing method, and provides a single-probe non-contact dielectric material testing and processing integrated system and a single-probe non-contact dielectric material testing and processing integrated method in order to solve the technical problems of poor real-time performance and controllability and low production efficiency of the existing dielectric material testing and processing technology. Comprising a controllable objective table, a resonant cavity single probe assembly, a programmable multi-way switch and a control unit, a single epitaxial microwave resonant cavity probe is adopted as a core component, and rapid switching and regulation of the resonant cavity single probe assembly, a vector network analyzer and a program control microwave signal generation and regulation device are realized through the programmable multi-way switch. By means of the testing and processing integrated system, non-contact type dielectric constant dynamic measurement and microwave processing can be alternately completed.

The invention relates to the technical field of material test and analysis, in particular to a solid material mixing uniformity detection method, which comprises the following steps of: 1, establishing a component characteristic response interval; 2, executing three-dimensional dynamic spectrum scanning; step 3, separating component contribution degrees, performing baseline correction and scattering compensation on original spectral data, calculating a weighted integral value of a spectral reflectivity signal in an exclusive characteristic wave band for each scanning point according to the mapping table, and outputting a contribution vector representing component concentration; 4, quantifying mixing uniformity, dividing a container space into three-dimensional units, and calculating a variable coefficient of a contribution vector of component concentration in each unit; and generating a weight coefficient based on the component mass ratio and the stability criticality, and evaluating the uniformity through a mixed index formula. Through accurate component identification, lossless three-dimensional scanning, accurate scattering compensation and mixing index evaluation comprehensively considering stability criticality, the uniformity of the mixed material can be comprehensively and accurately reflected.

The utility model provides a viscous-elastic material testing clamp and a viscous-elastic material testing device.The viscous-elastic material testing clamp comprises a clamp body and a first limiting structure, the clamp body is provided with a first limiting groove, and the depth direction parallel to the first limiting groove serves as the first direction, and the depth direction parallel to the first limiting groove serves as the second direction perpendicular to the first direction; at least one side of the side wall, forming the first limiting groove, of the clamp body communicates with the outside to form a first installation opening, and the first limiting groove is at least a semi-closed groove. The first limiting structure detachably blocks the first mounting opening; when the clamp main body is subjected to a force parallel to the first direction, the clamp main body forming the inner wall of the first limiting groove abuts against the viscous-elastic material test piece in the force application direction. Compared with the prior art, the viscous-elastic material test piece is stably limited through the first limiting groove formed in the clamp body, and flexible disassembly and assembly of the viscous-elastic material test piece can be achieved through the detachable first limiting structure.

The invention relates to the technical field of permeable material testing, solves the problem that a more complete material selection basis cannot be provided for engineering design in the prior art, and provides a method, a device and equipment for testing the heat dissipation performance of an evaporative cooling material and a storage medium. Acquiring a first mass change value of the to-be-tested sample in the simulated rainfall process; when the instantaneous moisture content meets a preset condition, rainfall simulation is stopped, and a second mass change value of the to-be-tested sample in a preset duration is obtained; placing the to-be-tested sample in the wind tunnel test platform, and obtaining a third mass change value and a surface temperature change value of the to-be-tested sample and an environment temperature change value, a humidity change value and a wind speed change value of the wind tunnel test platform; and obtaining a heat dissipation performance evaluation result of the to-be-tested sample based on the parameters. According to the method, quantitative, comparable and repeatable evaluation of the cooling capacity of the permeable material is realized, and a scientific basis is provided for material performance judgment and application scene selection.

The invention discloses a building material mechanical testing system based on multi-algorithm fusion, and belongs to the technical field of building material testing, and the system comprises an initial damage quantification module which is used for obtaining detection information of a tested material test piece before mechanical loading and generating a quantitative evaluation result; the loading and information acquisition module is used for applying a mechanical load to the tested material test piece with the generated quantitative evaluation result and acquiring a mechanical response signal and a microscopic state signal of the tested material test piece; the damage analysis module is used for calling a preset second data processing algorithm and analyzing and generating a dominant damage path; and the diagnosis and prediction module is used for integrating the associated data atlas and the dominant damage path information, generating a material performance diagnosis report and constructing a prediction model through a preset third data processing algorithm. According to the method, the initial damage of the tested material test piece is quantified, so that systematic deviation of a test result caused by neglecting the initial damage is corrected.

The utility model discloses a material testing device under erosion and cavitation coupling action, which comprises a container, an ultrasonic transducer, an injector head and a circulating device, a placing table is arranged in the container, the ultrasonic transducer is used for being arranged above the placing table, the injector head is arranged at the lower end of the ultrasonic transducer, and the circulating device is arranged on the placing table. The circulating device comprises a booster pump, a liquid inlet of the booster pump is communicated with the container, and a liquid outlet of the booster pump is connected with the injector head through a pipeline; in the using state, the ultrasonic transducer is electrically connected with an ultrasonic power source through a wire. According to the utility model, the erosion medium is pumped into the injector head through the booster pump, and meanwhile, the ultrasonic transducer enables the erosion medium to generate a large number of bubbles in the injector head, so that the erosion medium with the bubbles impacts a test material at a high speed, and the test condition of the hydraulic mechanical material is met.

The invention relates to the technical field of material detection, and discloses an asphalt concrete fluidity detection device which comprises a base, an extension rod is arranged on the outer surface of the driving end of a lifting mechanism, a detection rod fixedly penetrates through the end, away from the lifting mechanism, of the extension rod, and a detection head is fixedly connected to the bottom end of the detection rod. A cleaning assembly is arranged on the side edge of the lifting mechanism, a rotating assembly is arranged between the lifting mechanism and the cleaning assembly, the cleaning assembly comprises an inner ring arranged on the outer surface of the detection rod in a sleeving mode, and an elastic rubber ring is arranged in the inner ring. According to the asphalt concrete fluidity detection device, automatic cleaning of the detection head is achieved by means of an elastic rubber ring outside the detection rod and a reciprocating rotation structure, when the detection head moves upwards, the rubber ring with the larger size is elastically attached to the surface of the detection head to slide, meanwhile, the vertical plate track drives the gear rack to make the rubber ring rotate in a reciprocating mode, and unsolidified asphalt is scraped; and the cleaning effect is enhanced through rotation, attached materials are shaken off, manual cleaning is reduced, and the detection continuity and convenience are improved.

This invention discloses a quantitative evaluation method for the homogeneity of lightweight aggregate concrete based on rapid ultrasonic testing, belonging to the field of engineering materials testing technology. The method includes: S1, obtaining the shear wave velocity and longitudinal wave velocity at multiple test points of a series of lightweight aggregate concrete reference specimens; S2, calculating the shear modulus and bulk modulus at each test point of each reference specimen; S3, calculating the elastic modulus at each test point of each reference specimen; S4, constructing a relationship between the lightweight aggregate volume content, shear wave velocity, and longitudinal wave velocity based on the elastic modulus obtained in step S3; S5, obtaining the shear wave velocity and longitudinal wave velocity at each test point of the specimen to be tested, and calculating the lightweight aggregate volume content at each test point of the specimen to be tested based on the relationship; S6, evaluating the homogeneity of the specimen to be tested based on the lightweight aggregate volume content calculated in step S5. This invention solves the technical problem of insufficient accuracy in ultrasonic testing results for the homogeneity of lightweight aggregate concrete.

The invention discloses a method for simultaneously testing the thickness and refractive index of a material based on terahertz time-domain spectroscopy, which relates to the technical field of material testing and comprises the following steps: acquiring a reference signal and a sample signal by using a transmission-type terahertz time-domain spectroscopy system, and positioning a key pulse peak through an automatic peak value recognition algorithm; frequency domain phase information is obtained by combining fast Fourier transform, and then the phase difference between the main pulse and the echo is calculated; based on an optical path difference model, a relation equation set of the double-pulse phase difference and material parameters is established, the material thickness and the refractive index are obtained through inversion, and prior refractive index information is not needed; and finally, processing the data by adopting a local weighted regression smoothing algorithm to obtain comprehensive characterization parameters of the material. By adopting the method, high-precision, rapid and lossless thickness and refractive index measurement is realized, the applicability and the flexibility of measurement are remarkably improved, and the method has a wide industrial popularization prospect.

The invention relates to a geosynthetic material tensile test device, and belongs to the technical field of geosynthetic material test equipment. Comprising a plurality of clamping mechanisms, a plurality of pressure adjusting mechanisms, a plurality of thrust adjusting mechanisms, a plurality of displacement mechanisms and a control mechanism. The multiple sets of clamping mechanisms sequentially clamp the two sides of the geosynthetics in the width direction in the length direction of the geosynthetics, the pressure adjusting mechanisms penetrate through the clamping mechanisms, the clamping mechanisms are slidably installed on the displacement mechanism, and the multiple thrust adjusting mechanisms are connected with the multiple sets of clamping mechanisms in a one-to-one correspondence mode. The two ends of the geosynthetics in the length direction are connected with tension equipment, a first pressure sensor is arranged between the geosynthetics and the clamping mechanism, and a second pressure sensor is arranged between the thrust adjusting mechanism and the clamping mechanism. According to the invention, the quantitative relation among the longitudinal tensile strength, the normal load and the transverse tensile strength of the geosynthetic material in the soil can be explored at a relatively low test cost.

The invention relates to the technical field of material testing, and particularly discloses railway pre-buried channel tensile test equipment which comprises a testing machine body, a movable cross beam is slidably connected to the inner wall of the testing machine body, a clamp assembly is fixedly installed on the outer surface of the testing machine body, and a channel test piece is arranged in an inner cavity of the clamp assembly. The test piece can be quickly disassembled and assembled through the clamp assembly, meanwhile, the double-fixing effect is achieved, the stability of the clamp is improved compared with a traditional clamp, the initial inclination of the test piece can be detected during stretching, meanwhile, sliding can be prevented in the stretching process, an alarm can be given out in time when sliding is generated, and the work efficiency is improved. The material performance is accurately judged, the test equipment can have a certain buffering effect through the buffering assembly when the test piece is fractured, the influence of vibration of fracture vibration on the equipment is reduced, and fatigue damage, caused by vibration, of the equipment can be effectively reduced.

The invention relates to the field of material testing, and discloses an indentation testing device which comprises a supporting unit, a testing unit and a driving unit, an electric cylinder of the driving unit can drive a pre-contact assembly and an indentation assembly to reciprocate, so that rapid movement in a large range is realized, and a contact ball and a pressure head can rapidly approach a tested piece; the contact driver can drive the contact ball to reciprocate, so that the contact ball is in contact with the tested piece, and the contact ball is connected with an elastic body made of a memory alloy material; when the pressing head is pressed in, the piezoelectric stack of the driving unit is used for driving the pressing rod and the pressing head to move through the piezoelectric amplification mechanism, and the pressing-in precision of the pressing head is improved. According to the invention, the electric cylinder is used for macroscopic driving, and the piezoelectric stack is combined to precisely control the pressure head, so that the test precision and the test efficiency are improved, and a proper mechanical model is established after a press-in load-depth curve is obtained. The invention further provides an indentation testing method.

The invention relates to the technical field of building material detection, and discloses a green building material waterproof performance detection device and method.The green building material waterproof performance detection device comprises an operation table, a detection assembly fixedly installed at the top of the operation table and an air blower fixedly installed outside the detection assembly; the detection assembly comprises a detection shell fixedly connected to the top of the operation table, a comparison clamping mechanism is arranged in the detection shell, and through the arranged comparison clamping mechanism, when different environment simulation detection comparison needs to be carried out on the same sample, the comparison clamping mechanism can be used for clamping the same sample; the same samples (such as waterproof coiled materials and waterproof plates) are put into the first clamping opening, the second clamping opening and the third clamping opening respectively; the scouring simulation detection, the spraying simulation detection and the wading simulation detection are sequentially carried out, so that a large amount of detection data can be obtained in a short time, and the effect of improving the detection efficiency is achieved.

The invention relates to the technical field of material detection, and particularly discloses a method for determining content distribution of impurity elements in gradient depth of a surface layer of a quartz glass product. The method comprises the following steps: (1) putting a sample into a corrosion-resistant container in a clean environment; (2) adding 5-20wt% of hydrofluoric acid solution for etching, and collecting an extraction solution; (3) evaporating a part of the extraction solution to dryness, and adding 1-3wt% of nitric acid to dissolve residues; (4) measuring the concentration of impurity elements; (5) diluting the leaching solution, and then measuring the concentration of the silicon element; (6) performing a blank experiment; (7) calculating the etching quality and depth according to a formula; and (8) calculating the content of impurity elements in combination with the etching quality. According to the method, layer-by-layer analysis of the surface layer of the quartz glass at different depths in a range from submicron to tens of microns is realized, and the enrichment layer or diffusion gradient of impurity elements can be clearly and intuitively revealed.

The invention provides a refractory material compression resistance detection device and detection method, and relates to the technical field of refractory material detection, the detection device comprises a detection box body, and a positioning assembly, a first heating assembly, a pressurization assembly and a data acquisition assembly which are arranged in the detection box body; the positioning assembly supports two ends of the sample through two positioning blocks to realize suspended positioning; the heating assembly comprises a liftable first heating device which is in contact with the surface of the sample for heating; a pressurizing rod of the pressurizing assembly vertically penetrates through the heating device to apply pressure to the center of the sample; the data acquisition assembly monitors pressure, temperature and deformation in real time. According to the device, through cooperative work of the heating assembly and the pressurizing assembly, synchronous thermal loading is achieved, the problem of thermal history interference caused by heating and pressurizing separation in a traditional method is avoided, the service state of the refractory material in a high-temperature industrial environment can be truly simulated, and accurate data support is provided for high-temperature compression resistance evaluation.

The utility model belongs to the field of viscous-elastic material testing, and particularly relates to a viscous-elastic material testing support and a testing system, and the viscous-elastic material testing support comprises a support and a plurality of groups of deformation and pressure testing clamps which are not in contact with one another; a mounting hole is formed in the bracket, the bracket is used for placing a to-be-tested material, and the to-be-tested material covers the mounting hole; the deformation and pressure test fixture comprises a first chuck, an elastic sheet and a second chuck which are arranged in sequence, the other end of the first chuck is used for being connected to one of two parallel sides of a to-be-tested material, and the other end of the second chuck is used for being connected to the other of the two parallel sides of the to-be-tested material; and a strain gauge is pasted on the elastic sheet. The viscous-elastic material testing bracket provided by the utility model is accurate and reliable in displacement data measurement of a to-be-tested material under hydrostatic pressure. Therefore, deformation of all planes on the to-be-tested material and installation of the pressure test fixture are realized, and the isotropic performance of the material can be measured conveniently.

The invention discloses a seawater environment biaxial mechanical loading device based on synchrotron radiation X-ray diffraction, and belongs to the technical field of material testing in a seawater environment. Comprising a ray generator, and a slit, a mechanical loading device and a detector are sequentially arranged along a light path of the ray generator; a seawater environment box is arranged in the center of the mechanical loading device, and a three-dimensional adjusting platform is arranged below the mechanical loading device; by adopting the structure, in-situ characterization and analysis of corrosion product evolution at the crack are realized under the near-service working condition of a complex stress state and a seawater corrosion environment, and a technical support is provided for revealing a microcrack corrosion failure mechanism of a marine material under the near-service working condition.

The invention relates to the technical field of composite material testing, in particular to a recycling method and device for composite material tensile fragments, and the method comprises the steps that the bottom of a protective cover is adjusted to a preset inclination angle through an angle adjusting mechanism; covering a protective cover outside a clamping block for clamping the composite material in the tensile test device, so as to collect fragments generated in the tensile process of the composite material through the protective cover; the fragments in the protective cover are blown to the bottom of the protective cover through a plurality of air injection assemblies; and the fragments at the bottom of the protective cover are adsorbed through the movable suction cup and transferred to a preset recycling area outside the protective cover. According to the technical scheme, splashing fragments can be blocked through the protective cover, the fragments are guided to fall to the bottom of the protective cover in a concentrated mode, meanwhile, the fragments attached to the side wall of the protective cover and clamped in the grooves of the clamping blocks are blown through the air injection assemblies, and the collection efficiency of the composite material tensile fragments is improved.

The utility model relates to the technical field of building material detection, and provides a steel bar tensile strength tester, which comprises a tester assembly, a steel bar tensile strength tester, a steel bar tensile strength tester and a steel bar tensile strength tester, the tester assembly comprises a base and a tester body, and the tester body is fixedly connected to the upper end position of the base; the limiting assembly comprises sliding grooves, sliding blocks, first fixing shafts, first connecting rods, second fixing shafts, fixing blocks and limiting circular rings, the sliding grooves are formed in the two sides of the upper end of the base and the two sides of the bottom end of the tester body respectively, the sliding blocks are slidably connected to the inner portions of the sliding grooves, and the first fixing shafts are fixedly connected to the inner sides of the upper ends of the sliding blocks. The beneficial effects of the utility model are that the limiting assembly is arranged, the limiting circular ring is fixed at the position of the clamp, and the limiting circular ring is located at the outer side of the clamp, so that the two ends of the reinforcing steel bar respectively penetrate through the limiting circular ring to enter the clamp, the reinforcing steel bar can be kept in a vertical state to carry out tensile strength detection, and the detection accuracy is high.